EP3353423A1 - Kfz-vakuumpumpe - Google Patents
Kfz-vakuumpumpeInfo
- Publication number
- EP3353423A1 EP3353423A1 EP15766870.8A EP15766870A EP3353423A1 EP 3353423 A1 EP3353423 A1 EP 3353423A1 EP 15766870 A EP15766870 A EP 15766870A EP 3353423 A1 EP3353423 A1 EP 3353423A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- leaf spring
- valve seat
- vacuum pump
- outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
- F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
- F04C29/128—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type of the elastic type, e.g. reed valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
Definitions
- the present invention relates to a motor vehicle vacuum pump having a pumping space in which a pump rotor rotates by compression, and an outlet space into which the compressed gas exits from the pumping space.
- the vacuum pump has a partition wall which separates the pump space from the outlet space, and at least one outlet valve designed as a check valve in the partition wall, through which the compressed gas exits the pump chamber into the outlet space.
- a motor vehicle vacuum pump generates in a motor vehicle (motor vehicle), independently of the operating state of an internal combustion engine, a negative pressure of, for example, 100 millibars, which is required, for example, for operating a pneumatic brake booster and / or other pneumatically operated ancillary components.
- the object of the present invention is therefore to provide a quiet automotive vacuum pump with good efficiency.
- valve seat provided around the valve opening is raised.
- the valve seat is the part of the housing, which forms a bearing surface for the leaf spring, which forms the valve body. In the closed state, the leaf spring is in a prestressed state sealingly against the valve seat, so that the pump is not ventilated. This improves the efficiency of the pump.
- sublime in the sense of The present invention is an embodiment in which the region of the housing which forms the valve seat lifts itself off from a region directly adjacent thereto by at least 0.2 mm.
- a raised valve seat has the advantage that it defines the valve seat clearly defined by the adjacent housing.
- a radial overlap of the valve seat and the leaf spring according to the present invention is less than 1.5 mm, preferably 1.0 mm and more preferably less than 0.7 mm.
- the overlap is present in a predominant area, ie more than 50% of the circumference of the valve seat.
- the leaf spring can have a greater overlap.
- Ais overlap in the context of the invention the area of the valve seat is understood, which comes into contact with the closed leaf spring. In this contact area, the leaf spring overlaps with the valve seat.
- a radial direction in the sense of the present invention is a direction which is in the plane of the valve seat, perpendicular to a circumferential direction of the Valve seat runs.
- a radial overhang of the leaf spring is greater than 1.0 mm.
- the value of the radial overhang is not the same everywhere and may be less than 1.0 mm locally.
- the value for the radial overhang of 1.0 mm means that an average value for the radial overhang is greater than 1.0 mm.
- the region of the leaf spring is understood, which projects beyond the valve seat in the radial direction to the outside.
- the leaf spring used in the vacuum pump preferably has a thickness of 0.15-0.2 mm.
- the material used for the leaf spring is preferably Uddeholm UHB Stalnless 716 steel.
- the valve seat is surrounded by at least one adjoining chamfer.
- a bevel in the context of the invention are radii, edge fractures or a beveled surface to understand, which is formed on a workpiece edge.
- the chamfer connects two different sides of a workpiece.
- the chamfer has the effect that forms a circular air cushion with higher pressure during the closing operation of the leaf spring between the chamfer and the leaf spring, which slows down the leaf spring and minimizes the noise between the valve seat and leaf spring.
- the noise which results from a striking of the leaf spring on the valve seat, thereby significantly reduced.
- the chamfer is formed on the inner circumference of the raised valve seat.
- the chamfer adjoins the inside, ie proximally to the valve seat.
- the chamfer can therefore also be subsequently formed on the raised valve seat.
- a chamfer can be formed on the outer circumference of the raised valve seat.
- the valve opening and the leaf spring are kidney-shaped and fixed the leaf spring at one longitudinal end.
- the exhaust valve can be accommodated in a space-saving housing.
- two outlet valves are formed in the partition wall.
- the first exhaust valve forms a fluid outlet during a forward run and the second exhaust valve forms a fluid outlet during a reverse rotation of the rotor.
- the two leaf springs of the exhaust valves are formed by a single common spring body. Thereby, the number of parts of the vacuum pump is reduced, so that the assembly is facilitated and a confusion between the leaf springs is excluded.
- the grandeur of the valve seat is at least 0.5 mm, preferably at least 1.0 mm and particularly preferably at least 1.5.
- the distance between the valve seat and a housing surface is understood, from which the valve seat lifts itself constructively. This makes it possible to provide a sufficient bevel on the circumference of the valve seat.
- FIG. 1 A motor vehicle vacuum pump according to the present invention
- FIG. 2 a sectional view of the outlet valve of the motor vehicle vacuum pump according to FIG. 1
- Figure 3 A plan view of the exhaust valve of the automotive vacuum pump according to
- FIG. 1 shows a motor vehicle vacuum pump 10 according to the present invention.
- the vacuum pump 10 forms a pump chamber 12, in which a gas is compressed by a rotating pump rotor 11.
- a partition wall 22 separates the pump space 12 from an outlet space 14.
- the vacuum pump 10 to a check valve outlet formed as a forward run 20 1 and designed as a check valve outlet valve 20 backward pass.
- the exhaust valves 20 1 , 20 2 have as a valve body nlerenförmige leaf springs 40 1 , 40 2 , which close the valve openings 24 1 , 24 2 in a closed state.
- FIG. 2 shows a sectional view through the outlet valve forward 20 1 is shown.
- the outlet valve forward run 20 1 is formed from the nlerenförmigen leaf spring 40 1 , a raised through the pump housing valve seat 30 and the pump chamber 12 and the outlet space 14 connecting kidney-shaped valve opening 24 first
- the raised valve seat 30 formed with the grandeur E projects beyond a region of the pump housing which is directly adjacent to the valve seat 30.
- the valve opening 24 1 is closed by the leaf spring 40 1 , as shown in Figure 2. In the closed position, the leaf spring is 40 1 with an overlap U on the valve seat 30 sealingly. In an open position, the leaf spring 40 1 is bent such that it is spaced from the valve seat 30.
- the movement of the leaf spring 40 1 is limited by a direction of movement of the leaf spring 40 1 spaced from the valve seat 30 provided Ventllbeskyr 45.
- a chamfer 50, 51 is provided on an inner circumferential surface and on an outer circumferential surface of the valve opening 24 1 .
- the raised valve seat 30 is thus surrounded by two chamfers 50, 51.
- the Leaf spring 40 1 is formed such that it laterally projects beyond the valve seat 30.
- the leaf spring thus has a radial overhang UH.
- FIG. 3 shows a second embodiment of the present invention, in which two exhaust valves 20 1 , 20 2 are provided.
- One outlet valve 20 1 forms a fluid outlet during a forward run and the other outlet valve 20 2 a fluid outlet during a reverse rotation of the rotor 11.
- the valve openings 24 1 , 24 2 of the outlet valves 20 1 , 20 2 are, in the outflow direction of the fluid, provided to the right and left of a Befest Trentsmtel Ittel 70.
- This fastening means 70 fixes a spring body 72, which forms the kidney-shaped leaf springs 40 1 , 402 and, in the outflow direction of the fluid, above the leaf springs 40 1 , 40 2 arranged one-piece valve limiter 45 between the two kidney-shaped valve openings 24 1 , 24 2 at In the outflow direction of the fluid, the valve limiter 45 on the right and left of the attachment means 70 kidney-shaped Ventilbeskyrö Stammen 74 which are provided in the outflow direction of the fluid above the leaf springs 40 1 , 40 2 and laterally by the leaf springs 40 1 , 40 second be surpassed.
- This Ventilbeskyrö Stamm 74 allow easier release of the leaf springs 40 1 , 40 2 of the valve limiter 45 in a closing operation.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Check Valves (AREA)
- Compressor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2015/071848 WO2017050362A1 (de) | 2015-09-23 | 2015-09-23 | Kfz-vakuumpumpe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3353423A1 true EP3353423A1 (de) | 2018-08-01 |
| EP3353423B1 EP3353423B1 (de) | 2021-08-04 |
Family
ID=54150441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15766870.8A Active EP3353423B1 (de) | 2015-09-23 | 2015-09-23 | Kfz-vakuumpumpe |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20180291906A1 (de) |
| EP (1) | EP3353423B1 (de) |
| JP (1) | JP2018523780A (de) |
| CN (1) | CN108026926A (de) |
| WO (1) | WO2017050362A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5343508U (de) * | 1976-09-20 | 1978-04-14 | ||
| JPS55100757U (de) * | 1978-12-29 | 1980-07-14 | ||
| BR8901183A (pt) * | 1989-03-09 | 1990-10-16 | Brasil Compressores Sa | Valvula de descarga para compressor rotativo de pistao rolante |
| JPH0717985U (ja) * | 1993-09-08 | 1995-03-31 | 日本真空技術株式会社 | 油回転真空ポンプ |
| JP2009293546A (ja) * | 2008-06-06 | 2009-12-17 | Hitachi Appliances Inc | 密閉形圧縮機、およびこれを用いた冷蔵庫又はルームエアコン |
| DE112010002592A5 (de) * | 2009-06-17 | 2012-11-29 | Ixetic Hückeswagen Gmbh | Auslassventil aus verschiedenen materialschichten für eine vakuumpumpe |
| DE102010044898A1 (de) * | 2010-09-09 | 2012-03-15 | Schwäbische Hüttenwerke Automotive GmbH | Vakuumpumpe mit Lüftungseinrichtung |
| JP2015140709A (ja) * | 2014-01-28 | 2015-08-03 | トヨタ自動車株式会社 | ベーン式バキュームポンプ |
-
2015
- 2015-09-23 US US15/761,814 patent/US20180291906A1/en not_active Abandoned
- 2015-09-23 WO PCT/EP2015/071848 patent/WO2017050362A1/de not_active Ceased
- 2015-09-23 JP JP2018508202A patent/JP2018523780A/ja active Pending
- 2015-09-23 CN CN201580083001.XA patent/CN108026926A/zh active Pending
- 2015-09-23 EP EP15766870.8A patent/EP3353423B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018523780A (ja) | 2018-08-23 |
| WO2017050362A1 (de) | 2017-03-30 |
| EP3353423B1 (de) | 2021-08-04 |
| CN108026926A (zh) | 2018-05-11 |
| US20180291906A1 (en) | 2018-10-11 |
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